Where are each of our macronutrients (carbohydrates,proteinsand fats) chemically digested? Where does the process for each of them...

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Biology

Where are each of our macronutrients(carbohydrates,proteinsand fats)chemically digested? Where does the process for each ofthem begin? Also note all locations in the GI tract that theseprocesses continue (until each macronutrient has been broken downinto components that our cells can absorb).

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Answer In the intestine carbohydrates proteins and fats are digested where they are broken down into their basic units carbohydrates within sugars Proteins formed in amino acids Fats converted into fatty acids and glycerol For carbohydrates Carbohydrates continue absorption in the mouth The salivary enzyme amylase starts breakdown into maltose a disaccharide by food starches No major absorption of carbohydrates takes place as the food bolus passes through the esophagus to the stomach Protein digestion occurs through the action of three main enzymes in the stomach and duodenum pepsin secreted by thestomach and trypsin and chymotrypsin secreted by pancreas The digestion of certain fats starts in the mouth where lingual lipase allows shortchain lipids to break down into diglycerides The fat found in the thesmall intestine induces the release of lipase from the pancreas and the conversion of fat into fatty acids by bile from the liver Fat digestion process The first phase in the digestion of triacylglycerols and phospholipids begins in the mouth as lipids find saliva First the physical action of chewing combined with emulsifier activity enables the digestive enzymes to carry out their tasksThe digestion process is initiated by the enzyme lingual See Answer

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